rtc: Fix to svc sample encoder

Change-Id: I47d45efb7ade7b19b10bea544769447ee704cee3

examples/svc_encoder_rtc.c

diff --git a/examples/svc_encoder_rtc.c b/examples/svc_encoder_rtc.c
index af20123..e6af859 100644
--- a/examples/svc_encoder_rtc.c
+++ b/examples/svc_encoder_rtc.c
@@ -1112,8 +1112,8 @@
   exec_name = argv[0];
 
   // start with default encoder configuration
-  aom_codec_err_t res =
-      aom_codec_enc_config_default(aom_codec_av1_cx(), &cfg, 0);
+  aom_codec_err_t res = aom_codec_enc_config_default(aom_codec_av1_cx(), &cfg,
+                                                     AOM_USAGE_REALTIME);
   if (res) {
     die("Failed to get config: %s\n", aom_codec_err_to_string(res));
   }